The WPILibPi image includes FRCVision, which reserves USB cameras; to use PhotonVision, we need to edit the /home/pi/runCamera script to disable it. First we will need to make the file system writeable; the easiest way to do this is to go to
10.0.0.2 and choose “Writable” at the top.
SSH into the Raspberry Pi (using a tool like Putty ) at the Romi’s default address
10.0.0.2. The default user is
pi, and the password is
Follow the process for installing PhotonVision on “Other Debian-Based Co-Processor Installation”. As it mentions this will require an internet connection so plugging into the ethernet jack on the Raspberry Pi will be the easiest solution. The pi must remain writable!
Next, from the SSH terminal, run
sudo nano /home/pi/runCamera then arrow down to the start of the exec line and press “Enter” to add a new line. Then add
# before the exec command to comment it out. Then, arrow up to the new line and type
sleep 10000. Hit “Ctrl + O” and then “Enter” to save the file. Finally press “Ctrl + X” to exit nano. Now, reboot the Romi by typing
After it reboots, you should be able to locate the PhotonVision UI at:
In order for settings, logs, etc. to be saved / take effect, ensure that PhotonVision is in writable mode.